Tire tool



Jan. 23, 1940. q. L. SPEER 2,188,236

TIRE TOOL Filed March 5l, 1938 J, L. Speer l /+V 3f v EMM. W4 5U 4* Z7@wow/m Patented Jan. 23, 1940 if;

PATENT OFFICE v TIRE TOOL James L. Speer, Ponca City, Okla.

Application March 31,

1 Claim.

This invention relates to a tool for removing pneumatic tires fromvehicle wheels.

It is an aim of this invention to provide a tool adapted to be insertedbetween the bead of a tire and the rim of the wheel, and havingrotatable means to engage the tire and wheel and to move relativelythereto to disengage the beadl on one side of the tire from the rim. I

A further aim of the invention is to provide a device which may be usedfor mounting a pneu matic tire on the felly of a wheel.

Other objects and advantages of the invention will hereinafter becomemore fuly apparent from the following description of the drawing whichillustrates a preferred form of the invention, and wherein:

Figure 1 is a top plan View of the tool,

Figure 2 is a longitudinal vertical sectional view taken on the line 2-2of Figure 1,

Figure 3 is a cross sectional view taken on the line 3-3 of Figure 1,

Figure 4 is a longitudinal vertical sectional viewl taken on the line4-4 of Figure 1,

Figure 5 is a cross sectional view taken on the line 5-5 of Figure 1,and

Figure 6 is a view showing the device applied to a tire and wheel anddisposed at the proper angle for removing the bead on one side of thetire from the felly of the wheel.

Referring more particularly to the drawing wherein like referencecharacters designate like or corresponding parts throughout thedifferent views, IIJ designates generally a rotatable shaft having acrank I I secured to one end thereof by means of the fastening I2.

Loosely mounted on the opposite end of the shaft I0 is a casingdesignated generally I3, and comprising the end portions I4 and I5,which are oval-shaped as seen in Figures 3 and 5.

A sleeve I6 is keyed to the free end of the shaft Il), as seen in Figure2, and has one of its ends projecting through an opening I1 in themember I5, and its opposite end abutting against the inner side of theend member I4. AV-member I8, arcuately shaped in cross section, connectsthe ends I4 and I5 and is disposed beneath the under part of sleeve I6and spaced therefrom. A housing I9 is loosely mounted on shaft I0 and isprovided with the flange portions 20 which are turned inwardly to engagemember I5. The rearwall of the housing I9 is spaced from the member I5forming the space 2I through which sleeve I6 extends, and in which theannular gear 22, which is keyed to sleeve I6, is adapted to revolve. Asleeve 23, keyed to shaft I0 by means of the pins 1938, Serial No.199,285

24, is mounted on the shaft III between housing I9 and the crank I I.

A pair of rollers 25 journaledin the ends I4 and I5 of the casing I3,are disposed one at each side of and beneath thesleeve I6 as seen inFigure 6. Pinions 26 are keyed to corresponding ends of rollers 25, andpositioned in space 2| of housing I9 to mesh with the gear 22.

A screw 21 engaging the threaded opening 28 in end 29 of shaft I0 tohold washer 30 and ring 3| against end I4 of casing I3, retains thevarious parts forming the tool assembled.

From the foregoing it will be seen that sleeve I6 and rollers 25` may beinserted between the felly 32 of a wheel, not shown, and the bead 33 ofa pneumatic tire. By swinging the crank end II of the tool downwardlythe bead 33 will be disengaged from the inturned flange 34 of the felly32, as seen in Figure 6. Crank II may then be rotated to rotate thesleeve IG, which is in Ven'- gagement with the bead 33 and to revolvethe rollers 25 which are in engagement with the flange 34. Rollers 25being connected by pinions 26 to the gear 22 are revolved in theopposite direction to sleeve I6, so that the tool will be moved aroundthe flange 34 of the felly 32 to raise and release the bead 33. Therollers 25 by being revolved in the opposite direction to the sleeve I6will cause the tool to move relatively to the felly 32 and to the tirebead 33, since the rollers 25 and the sleeve I6 are each provided with aroughened surface to insure a frictional engagement.

The tool may also be used to apply the tire to the wheel, by insertingthe rollers and sleeve between the bead 33 and the flange 34 and byraising the free end of the tool until it is inclined downwardly so thatthe tool as it moves between the flange and bead will force the beadinwardly and downwardly and release it in a position to engage theflange 34.

Various modications and changes may obviously be made and arecontemplated, and the right is therefore reserved to make such changesas do not depart from the spirit and scope of the invention ashereinafter dened by the claim.

I claim asmy invention:

A pneumatic tire demounting tool comprising a shaft having a crank atone end thereof, a casing loosely mounted on the opposite end of saidshaft and in which said shaft is rotatably mounted, said casingincluding spaced end members connected by a bridge, disposed in spacedapart relationship to the adjacent portion of said shaft, one of saidend members having a hollow said sleeve, gears formed on correspondingends of said rollers, disposed within said gear box and in mesh with thesleeve gear whereby the sleeve and rollers will be revolved in oppositedirections by said shaft, and means on the last mentioned end of saidshaft to removably retain the casing 5 in position thereon.

. JAMES L. SPEER.

